ES2271974T3 - PROCEDURE AND APPARATUS FOR THE TREATMENT OF LIQUIDS. - Google Patents

Abstract

THIS INVENTION REFERS TO A LIQUID TREATMENT PROCEDURE, WHICH IS INTENDED TO PARTICULATE THE FILTERING OF A LOW PRESSURE LIQUID, AS FOR EXAMPLE THE WATER THAT COMES FROM A WATER DISTRIBUTION SYSTEM, THROUGH AN APPLIANCE, THAT HAS A FRAME ) BASICALLY CLOSED, IN CONNECTION WITH WHICH A FILTER MEDIA (2) HAS BEEN AVAILABLE AT LEAST (2) TO PURIFY THE LIQUID AND FLOW MEDIA (3), AS FOR EXAMPLE DEVICE OF FUEL FLOW / REJECTION FLOW (3, 3B) THAT ENSURE THE LIQUID FLOW. THE FILTRATION MEDIA (2) CONSISTS OF A FINE FILTRATION FILM (2A) ADVANTAGESLY MADE OF PLASTIC-BASED MATERIAL, AS FOR EXAMPLE PTM (PARTICULATE FOLLOW-UP MEMBRANE), TEM (MONITORING AND ATTACK MEMBRANE) OR ANALOG THICKNESS IS, PREFERREDLY FROM 7 - 25 MI M, AND THE Pore SIZE IS 0.05 - 10 MI M. THE FILTER FILM (2A) THAT BELONGS TO THE FILTER MEDIA (2) IS BASICALLY PURIFYED IN ONE MODE AUTOMATIC, AS FOR EXAMPLE THROUGH A MEANS OF DEPURATION (5) USING THE PRESSURE (P), MOVEMENT (V1) AND / OR OTHER FACTORS OF THE LIQUID TO BE TREATED AND / OR THE LIQUID THAT HAS BEEN TREATED. THIS INVENTION REFERS ALSO TO A DEVICE THAT WORKS ALSO ACCORDING TO THIS PROCEDURE.

Description

Procedure and apparatus for the treatment of liquid.

The present invention relates to a procedure for treatment of liquid by means of an apparatus the  which is designed to filter liquid under pressure, such as water conducted from a water distribution system or the like and which has an essentially closed body, in connection with the which there are at least filter media to purify liquid by means of a filtration flow through them, and means of flow comprising feed flow and flow arrangements Exhaust to drive liquid. The filter media are purified by means of a reverse flow leading the treated liquid, such as filtered water, from an intermediate storage space that is connected to a secondary part of the filter media to through the filter media as a flow that takes place in the opposite direction with respect to the filtration flow.

EP 0531817 discloses a system for filter pressurized liquid comprising a closed body with filter media and feed flow and flow arrangements exhaust, in which the filter media are purified by a reverse flow of treated liquid that is guided from storage intermediate that is connected to the secondary part of the media filtering

A liquid purification system according to the Patent No. EP 0531817 is very complicated, which has components totally separate such as a supply unit of filtering aid, a filtering assembly, a unit of re-extraction and an ultrasonic wave generator, running also the system by means of pumps. The system in question is based on the use of porous filters, described below in more detail the problems that these entail.

On the other hand, the patent application Finnish No. 944287 reveals the type of debugging device of water described above comprising a filter component with membrane structure. The solution in question is designed to function through the so-called siphon principle, thanks to the which structure is very simple. The device of Water purification in question is very safe and easy to use in the practice, because water quality, which thanks to the phenomenon of siphon flows to the point of accumulation self-feeding and in a way continuous, it is always homogeneous regardless of the time of device operation. This is based first of all on that a water purification device equipped with a film Fine PTM or TeM filter does not let parts pass through at any stage materials that exceed a certain particle size, in which case, when the filtering film gets dirty, only the speed of Filter penetration decreases and can even be interrupted totally in case the filter film is not cleaned with frequency.

The device described above is very useful in most heterogeneous connections, for example in the land to filter lake water or also under other conditions, in those that the normal I tap water cannot be used. A disadvantage of the device is, in particular, the slowness of the filtering speed of the same and on the other hand also the fact that, for example, during normal use in homes the device requires the use of separate containers, so that could enhance the operability of the siphon phenomenon. In the practice, cleaning the filter film of the device in issue is also disadvantageous to some extent because it should carry out first manually as a stage totally separate from operation. Manual cleaning of the film Filtering is on the other hand also disadvantageous in that, during mechanical friction by treating too much "clumsy", the pores of the filter film can be enlarged unintentionally or on the other hand they may get stuck with impurities This is the reason that the operability of the film filter of a device that is used in special conditions of dirt can get too weak immediately after first cleaning measure due to the decreased capacity of penetration. A fundamental disadvantage of the type of apparatus in question in practice may however be the fact that it is not possible to exploit it as such in a very simple, for example to filter directly conducted water from a water distribution system, but instead it they must use water containers separated by the principle of siphon.

In addition, for example of Japanese application no. 5-177 185 it is known how to exploit a device membrane structure filter that is placed on a pylon which comprises liquid to be treated. The solution in question It is therefore designed for large-scale use, but in principle a corresponding type of solution can be placed for example directly also at the end of a supply pipe.  In the solution in question the filter media are enhanced by means of the so-called sleeve filter principle in a way that the liquid to be treated crosses the walls of the elongated membrane pipes to the secondary part of the filter, keeping the water clean and also, for some practical purpose, to through a flow path that is connected to this side. The solution in question is advantageous in the sense that to debug the reverse media has exploded a reverse discharge flow of water, in which case on the secondary side of the filter it has placed a supplementary container that keeps the water filtered. In this case, when the water flow is interrupted, it is used a pump that feeds the filtered water from the container supplementary as a reverse flow through the pipes filters, in which the same is purified.

The provision in question is advantageous in the sense that the porous structures of the filtering plumbing can be cleaned by water discharge by means of a flow reverse. In practice the type of elongated pipe structures and flexible as described above, they accumulate however impurities especially on the outer surfaces of the themselves; that is the reason why for example you can accumulate the bacterial growth in them, which however cannot be directly influenced by the reverse flow type previously described. This is the reason that the principle of Water discharge in question works only partially. In addition to that, the type of solution also has a disadvantage such that the filtering plumbing is a very confusing set, which is why the reason that it is not possible to obtain any kind of vision of the inside of it, in which case, for example, they cannot perceive fungi or any other unwanted formulation of Corresponding bacteria that are generated with these. The solution in question is also disadvantageous also that you must use a separate pump for discharge purification of water, which requires very complicated control and automation and adjustment instrumentation. This in turn makes use of the harder device and also decisively decreases the effectiveness of it in practice.

However, at present there are no water treatment plants or similar in the market that are sufficiently profitable with the acquisition or operation and that are technically easy to use, by example for use in homes and that work in a way sufficiently effective and especially eliminate bacteria in all the condition classes reliably enough.

It is an objective of the procedure according to the invention achieve a decisive improvement in the problems presented  previously and thus substantially raise the level of techniques previous. To achieve this goal, the procedure is characterized mainly because the filter media, which are made with one or several fine filtering films made with plastic-based material and provided with a provision of support to support them, they are essentially debugged self-feeding, whereby a main side of said / s film / s, is cleaned by water discharge through a flow of step that is carried out by the liquid to be treated that goes through it essentially tangentially and in which water discharge flow in the opposite direction is achieved by less partially by means of the so-called ejector principle by that the liquid is absorbed from the intermediate space of storage through the influence of ejector caused by the flow of passage that takes place on the main side of said / s films.

As the most important advantages of the procedure according to the invention, simplicity and reliability can be mentioned of the construction and use of it, whose issues are fundamental requirements to achieve a debugging result reliable, especially when the goal is to produce for example drinking water in the most heterogeneous circumstances. Thanks to simple principle of the procedure, the manufacture of the apparatus that it will be exploited with this is also advantageous, in addition to which the procedure is also profitable thanks to the operability continues from it, since the filter film that belongs to it can be debugged extremely easily, quickly and reliable. In addition to that, a fundamental advantage of the procedure is also the fact that debugging measures are no longer needed manual, so that there can be no direct mechanical friction of the filtering film. Thanks to the procedure, the movie filter can be cleaned effectively by discharging water in first place all over the outer surface of it exploding a flow of untreated water, and on the other hand a reverse flow of the treated liquid, which is for example water filtered, which takes place through the hole. Thanks to procedure the quality of the liquid produced is always homogeneous, since the filter film, which remains undamaged and effectively clean, does not let parts penetrate at any stage materials that exceed a certain particle size.

The related subordinate claims with the process they describe preferred embodiments of the procedure according to the invention.

The invention also relates to an apparatus that It will be used within the procedure. The device is defined in more detail in the preamble of the independent claim aimed at it. The main features that above all characterize the apparatus are exposed in the characterizing part of the same claim.

As the most important advantages of the device according to the invention may mention the simplicity and reliability of the construction and use thereof, in which the apparatus can be use very simply, for example anyway from the daily use in homes for most circumstances heterogeneous, for example to purify the conducted water directly from a water distribution system. An advantage fundamental of the apparatus according to the invention is the fact that the filter film can be cleaned by water discharge so completely reliable by means of a flow of passage that takes place, on one side of it. On top of that, the filter film will effectively cleans by water discharge through a flow inverse as well as taking place through it, in which the connection ejector principle is further exploited to absorb filtered water from an intermediate container placed on the side of clean water. A fundamental advantage of the device according to the invention, it is first of all the fact that the healthiness of the filter film does not require any manual measurement, that means for example the direct friction of it, but instead all the measures related to it can be carried out through the flows described above without opening the apparatus. The apparatus according to the invention can be formed as a very compact structure that can be used according to very principles simple and in many ways, for example directly in the end of the supply pipe or for example below the kitchen stack, so that only the pipe that conducts the filtered water as well as for example a lever arrangement by means of which one can desirably control a valve arrangement that adjusts the flows of the device, you should only put in sight to achieve the desired operability in each moment. The device is very cost-effective to manufacture thanks to the which also its acquisition costs are moderate.

Subordinated claims addressed to apparatus disclose preferred embodiments for the apparatus according to the invention.

The invention will be described below in detail referring to the attached drawings, in which:

Figure 1 shows an advantageous principle of operation of the method according to the invention,

Figure 2 shows an advantageous principle of operation of an apparatus that exploits the procedure according to the invention during a filtration situation,

Figure 3 shows the operability of the form of embodiment shown in figure 2 during a situation of water discharge, and

Figure 4 shows an advantageous principle of composition of an advantageous apparatus according to the invention as a perspective view and an exploding view.

The invention relates to a method for liquid treatment by means of a device that is designed to filter pressurized liquid such as water conducted from a water distribution system or the like which has a body 1 essentially closed in connection with which there are at least filter media 2 for purifying liquid by means of a flow v1 filtration through it and a flow means 3 that comprise provisions 3a, 3b of feed flow and flow Exhaust to drive the liquid. The filter media 2 is they purify by means of a reverse v1 '' flow conducting liquid treated such as filtered water from an intermediate space 6 of storage that is connected to a secondary side II of the filter media 2, through filter media 2 as a continuous flow that takes place in the opposite direction from the v1 flow of filtration.

With particular reference to the view of water discharge flow shown in figure 3, means 2 Filters, which are manufactured with one or several thin 2nd films Filters, made with plastic-based material and provided of a support arrangement 4 to support them, they are debugged essentially self-feeding, in which a main lateral I of said film / s 2a is cleaned by water discharge by means of a flow v1 'of passage that is carried out by the liquid that it will be treated that goes through it essentially tangential, and in which the water discharge flow v1 '' in the opposite direction is achieved at least partially by means of the called the ejector principle, whereby the liquid is absorbed from the intermediate storage space 6 by means of the ejector influence caused by the flow v1 'of passage that has place on the main side I of said film / s 2a.

Through the actions described above, first he achieves a v1 'turbulence flow that discharges water through the main side I of the filter film 1 and In addition to the above, on the other hand it is possible to clean by water discharge the holes of the 2nd filter film effectively across the entire surface of it through of the reverse v1 '' flow that is carried out by the principle of ejector.

For example, a 2nd PTM / TeM filter film it is advantageously used in the apparatus, which has been produced by example radiating and recording a basic plastic sheet. Using a relatively thin filter film as described previously, the pressure loss caused by the media Filters can be effectively minimized, in which case the procedure according to the invention works sufficiently effective and yet completely reliable in any circumstance because bacteria penetration is avoided. The continuous flow of an apparatus that exploits the procedure according to the invention is multiple thanks to the film above described in comparison to a ceramic scrubber, which is also for example more disadvantageous by the manufacturing costs of the same or compared to the type of "sleeve" filter that describes at the beginning, in relation to which it is neither possible nor exploit the operation of water discharge provisions so effectively. The surface of the filter film that is used in the apparatus according to the invention is ideally uniform in together, thanks to which the generation of for example, the growth of bacteria on the surface of the same.

A device that works according to the type of procedure described above, presents a body 1 essentially closed, in connection with which there are at least 2 filter media for purifying liquid by means of a v1 flow filtration through it and the flow means 3 which comprise provisions 3a, 3b of feed flow and flow of escape to drive liquid. The apparatus also comprises some debug media 5 to debug the filter media 2 that include at least v1 '' secondary water discharge means that purify the filter media 2 by a reverse flow that has place conducting treated liquid such as filtered water from a 6 intermediate storage space that is connected to one side Secondary II of the filter media 2 as a continuous flow that takes place in the opposite direction with respect to the flow v1 of filtration.

With particular reference to the view of the water discharge flow shown in figure 3, said means 5 debugging to debug the filter media 2, which are made with one or several thin filter films made with plastic-based material and provided with a support arrangement 4 to support them, comprises the main v1 'means of discharge of water that cleans by discharge of water a main side I of said filtering film / s 2a by means of a flow of passage carried out by the liquid that will try to go through it essentially tangentially, and in which the water discharge flow of the media v1 '' secondary water discharge in the opposite direction is arranged at least partially by means of the so-called principle of ejector absorbing liquid from said intermediate space 6 of storage through the influence of ejector caused by the flow v1 'of passage that takes place on the main side I of said filtering film / s 2a.

In all views shown, in connection with body 1 advantageously at least two films have been arranged 2nd parallel filters and 4a support surfaces that are located essentially uniformly compared to the previous one, by the one that the liquid that has passed the 2nd filtering films during the filtration flow is arranged to be conducted outside the body 1 through spaces between the filtering films 2a and the support surfaces 4a by the flow junction 3b1 of escape. With particular reference to Figure 4, the surfaces 4th support also advantageously have a surface model such as a corrosion x, grooved or similar to form the space of flow in question. The flow v1 'of passage of the liquid to be try what happens next to the 2nd filtering movies is willing with flows that are advantageously distributed from the flow of feeding of the liquid to be treated with a connection in series (figure 1) or with a parallel connection (figures 2 and 3) to along the sides of the 2nd filtering films.

As an advantageous embodiment the apparatus is arranged as an essentially uniform unit arranging the flow means 3, the intermediate space 6 of storage and / or a valve arrangement 7 to drive the liquid flows essentially incorporated into the same body 1.

In addition, with reference to Figure 1, in the main space I surrounding one or more films 2a of the filter media 2, turbulence means 8 are provided such as liquid flow retarders, mixers or similar to make the impact of water discharge from flow v1 'of most effective step.

In addition, as an advantageous embodiment valve arrangement 7 comprises means for carrying out the water discharge flow v1 '' in the opposite direction as well say it automatically during the interruption of the flow v of treated liquid to be evacuated from the device, decreasing essentially the pressure on the main lateral I, whereby also partially due to a pressure p of power that affects the intermediate storage space 6, the content thereof carries out said discharge flow v1 '' of water when it comes out through the 3b2 exhaust discharge junction of Water.

Especially with regard to provision 7 of valve, the arrangement shown in figure 1 is based on the principle that the valve 7a of the feed water pipe it is kept continuously open, whose embodiment is like this applicable for use for example hidden under the countertop in front of the mixer. In this case only the pipe of supply for filtered water as well as a control panel, control levers or the like of valve arrangement 7 are You can install on the kitchen sink. When the device is is using on the other hand for example directly at the end of the supply pipe or correspondingly in a way in the one that the water supply valve 7a closes with frequency, the latest automatic water discharge flow works always when the supply water valve is disconnected in issue as long as the flow valve 7b is kept open discharge of exhaust water long enough later, so that the last water discharge be carried out when the valve 7c Leakage of filtered water remains disconnected. Depending from the beginning of march in principle it is possible to use more valves in valve arrangement 7 or otherwise in the practice only one, for example the so-called hydraulic valve check, which disconnects and connects the necessary connections of flow in every moment.

In addition, as an embodiment especially advantageous, the body 1 of the apparatus, which can be close with cover parts 1e, and filtering films 2a placed on both opposite sides of it are manufactured to form an integral unit by arranging in the composition in issue advantageously by heat treatment such as molding by injection or correspondingly a 1r edge mounting that closes jointly the edges of the body 1 and the films 2a Filters, for example according to the principle shown in Figure 4. In addition, as an advantageous embodiment, the films 2a Filters are advantageously reinforced by rolling at least one outer surface thereof as on the side oriented to the support surface 4a, a reinforcing layer v preferably made of nonwoven material.

It has been discovered that the constructions above allow you to use a larger pore size in film 2a filter that especially with more heterogeneous structures, which, however, they can be much more advantageously between 0.2-0.6 µm. In this case, the pore density preferably corresponds between 5 x 10 8 - 5 x 10 7 pieces / cm2. In addition, a plastic-based material is used, preferably polyethylene / polypropylene as the v layer of reinforcement, whose weight is 15-50 g / m2.

It is obvious that the invention is not limited to embodiments presented or described above, but which instead can be modified greatly within the idea basic Therefore it is possible in principle to carry out constructions related to the apparatus according to the invention of many modes, for example using a structure with, for example, a circular cross section having for example a film cylindrical filter. On the other hand it is also possible to use the type of solutions shown in the accompanying drawings of different modes, using several units of filter film placed by example in parallel, in series or one over another. Naturally, in addition to said PTM and TeM films, it is possible that you can also use other types of film that are suitable for this purpose. When the type of filter film is used, for example mentioned above, you can also naturally use a waterproof wall as the support surface, formed thus by a network, a grid or the like. This type of construction may not correspond to the embodiment represented previously especially in the sense of the costs of manufacturing, which in the first place are due to, for example, a Support frame constructed of metal can be oxidized during use and, when manufactured with a sufficiently good material or correspondingly of plastics, it is too expensive. Of course it is obvious that also the pipeline arrangements like this as valve arrangements can be carried out for many heterogeneous modes depending on the fact that how and with what type of connections the procedure and the apparatus are being used. Thus, the valve arrangement can be carried out with valves. that act mechanically or with pressurized means and / or in addition to previous, also exploiting electricity, in case of power by example the debugging devices are desirable to act by example with the so-called remote control principle.

Therefore, the embodiments shown in the drawings represent the most important principles suggestive, in which case it is naturally obvious that for example, the intermediate storage space and / or valve arrangement is they can form as a total unit that belongs more or less than integral form to the body. Besides that, many parts of the device according to the invention can be produced using the techniques and more heterogeneous manufacturing materials that naturally have some influence on the appearance of the respective building.

Claims (9)

1. Procedure for the treatment of liquid by means of an apparatus that is designed to filter pressurized liquid such as water conducted from a water distribution system or the like and that has an essentially closed body (1), in connection with which there are at least filter means (2) for purifying liquid by means of a filtration flow (v1) through it, and flow means (3) comprising arrangements (3a, 3b) of feed flow and exhaust flow for conduct liquid, in which the filter media (2) are purified by means of a reverse flow (v1 '') conducting treated liquid, such as filtered water, from an intermediate storage space (6) that is connected to one side ( II) secondary of the filter media (2), through the filter media (2) as a continuous flow taking place in the opposite direction with respect to the filter flow (v1), characterized in that the filter media (2), which they are manufactured os with one or several thin filtering films (2a), made with plastic-based material and provided with a support arrangement (4) to support them, are essentially purified by feeding, whereby a main side (I) of said / s film / s (2a), is cleaned by discharging water by means of a flow (v1 ') of passage that is carried out by the liquid to be treated that passes through it essentially tangentially and in the that the flow (v1 ') of water discharge in the opposite direction is achieved at least partially by means of the so-called ejector principle whereby the liquid is absorbed from the intermediate storage space (6) by the influence of ejector caused by the flow (v1 ') of passage that takes place on the main side (I) of said film (s)
(2nd). 2. Method according to claim 1, characterized in that one or more filtering films (2a) of the filtering means (2) is made of PTM (Membrane for particle traces) or TeM (Membrane for tracing of traces), whose thickness is 7-25 µm and whose pore size is 0.05-10 µm. 3. Method according to claim 1 or 2, characterized in that the flow (v1 '') of water discharge in the opposite direction is carried out so to speak automatically, essentially reducing the pressure on the main side (I) during the interruption of the flow (w) of treated liquid to be evacuated from the apparatus, whereby also partially due to the influence of a supply pressure (p) that affects the intermediate storage space (6), the contents thereof lead to conduct the same flow (v1 '') of water discharge when they exit through the water discharge exhaust connection (3b2). 4. Apparatus for the treatment of liquid that is designed to filter liquid under pressure such as water conducted from a water distribution system or the like, whose apparatus has an essentially closed body (1), in connection with at least one means (2) filters for purifying liquid by means of a filtration flow (v1) therethrough, and flow means (3) comprising arrangements (3a, 3b) of feed flow and exhaust flow for conducting liquid, wherein the apparatus further comprises means (5) for purification to purify the filter media (2), which include at least secondary water discharge means (v1 '') that purify the filter media (2) by reverse flow which takes place by conducting treated liquid, such as filtered water, from an intermediate storage space (6) that is connected to a secondary side (II) of the filter media (2), through the filter media (2) as a continuous flow that takes place in the opposite direction with respect to the filtration flow (v1), characterized in that said purification means (5) for purifying the filter means (2), which are manufactured with one or more thin filter films (2a), made with plastic-based material and provided with a support arrangement (4) to support them, it comprises main means (v1 ') of water discharge that clean by water discharge a main side (I) of said film / s / s (2a) filters by means of a flow of passage carried out by the liquid to be treated that passes through it essentially tangentially and in which the flow of water discharge from the media (v1 '') Secondary water discharge in the opposite direction is arranged at least partially by means of the so-called ejector principle by absorbing liquid from said intermediate storage space (6) by means of the influence of ejector caused by the flow (v1 ' ) of passage that takes place on the main side (I) of said filtering film (s) (2a). 5. Apparatus according to claim 4, wherein in connection with the body (1) of the apparatus there are at least two parallel filter films (2a) and support surfaces (4a) that are placed essentially uniformly against the previous one, in that the liquid that has passed the filtering films (2a) during the filtration flow is arranged to be conducted outside the body (1) through spaces between the filtering films (2a), and the supporting surfaces (4a) have a surface model such as a corrosion (x), grooved or the like to form the flow space in question, characterized in that the flow (v1 ') of the liquid to be treated that passes next to the films (2a) Filtering is arranged by means of flows that are distributed from the feed flow of the liquid to be treated as a serial or parallel connection. 6. Apparatus according to claim 4 or 5, characterized in that the apparatus is arranged as an essentially uniform assembly by providing the flow means (3), the intermediate storage space (6) and / or a valve arrangement (7) for receiving the liquid flows essentially incorporated into the body (1). 7. Apparatus according to any of the preceding claims 4-6, characterized in that on the main space (I) of one or more filtering films (2a) there are turbulence means (8) such as liquid flow retarders, mixers or the like for make the impact of water discharge from the flow (v1 ') of passage more effective. An apparatus according to any of the preceding claims 4-7, characterized in that a valve arrangement (7) comprises means for carrying out the water discharge flow (v1 '') in the opposite direction automatically during the interruption of the flow ( w) of treated liquid to be evacuated from the apparatus essentially reducing the pressure on the main side (I), in which also partially due to the influence of a feed pressure (p) affecting the intermediate storage space (6) , the content thereof carries out said water discharge flow (v1 '') when it exits through the water discharge exhaust connection (3b2). 9. Apparatus according to any of the preceding claims 4-8, characterized in that one or more filtering films (2a) of the filtering means (2) is made from PTM (Membrane for particle traces) or TeM (Membrane for trace engraving), whose thickness is 7-25 µm and whose pore size is 0.05-10 µm.